Straight-knife cloth-cutting machine.



IVI. ZAWISTOWSKI 6I N. KOMOW.

STRAIGHT KNIFE CLOTH-"CUTTING MACHINE.

APPLICATION FILED JULY 28.1911.

Lgyrlg. v PatentedSept. 3,1918@ 4 SHEETS-SHEET l. 4Z

71111111 IIII'IAv IVI. ZAWISTOWSKI & N. KOMOW.

STRAIGHT KNIFE CLOTH CUTTING MACHINE. APPLlcATloN FILED JULY 28. |911.

Patented Sept. 3, 1918,

4 SHEETS-SHEET 2 M. ZAWISTOWSKIL N. KOIVIOW.

STRAIGHT KNIFE CLOTH CUTTING MACHINE.

APPLICATION FILED JLJLY 28.19l7.

l ,27?,8 1 2. Patnted Sept. 3, 1918-.

4 SHEETS-SHEET 3.

IVI. ZAWISTOWSKI 6L N. KONIOW.

STRAIGHT KNIFE CLOTH CUTTING MACHINE.

APPLICATION FILED IuLY 2a. I9I7.

l,7?,812. Pumedsept. 3,1918,

4 SHEETS-SHEET 4.

f TTED STATES PATENT OFFICE- MARTIN ZAWISTOWSKI AND NICOLAS KOMOW, OF BROOKLYN, NEW YORK, .ASSIGNORS TO UNITED STATES CLOTH CUTTING MACHINE CO., INC., OF NEW YORK, N. Y., A

CORPORATION or NEW YORK.

STRAIGHT-KNIFE CLOTH-CUTTING MACHINE.

- ting machine of the reciprocatory straightknife type, the objects being to simplify and lower the cost of construction and reduce dimensions, to overcome vibration and looseness, to facilitate manufacture, assemblage, repair, and interchange of parts, to provide an improved presser-foot construction, which may yield upward automatically in addition to being vertically adjustable, and generally to improve the mechanical organization of the machine. The preferred embodiment of the machine will now be briefly described and its novel features and combinations more particularly pointed out in the appended claims.

In the drawings:

Figure 1 is a view, partly in side elevation and partly in vertical section, of the complete machine, intermediate portions of which are broken `away for, economy of space;

Fig. 2 is a detail vertical sectional view on the line 2 2 of Fig. l;

Fig. 3 is a front elevation, with the front cover removed;

Figs. ft and 5 are detail views in plan and front elevation, respectively, of the slideblock;

Fig. 6 is an inner face view of the crank disk;

Fig. 7 is a front elevation of the motor and front cover, with the parts carried thereby, a portion of the latter being broken away;

Fig. 8 is a top plan of the motor bracket;

Specication of Letters Patent.

Patented Sept. 3, 1918.

Application led July 28, 1917. Serial N 0. 183,211.

section and partly in elevation.

2 is a base, such as these machines cus# tomarily possess, and from which rises a support, Whereon the knife and driving mechanism are mounted and the former Vthe complete guide box partly in vertica guided. The support in the present instance I comprises a fixed standard section 3, in the front of which the major portion-of the knife 4 is guided, and a motor bracket 5,

which is separate from the standard on the one hand and the motor 6 on the other hand and is capable of being removed and interchanged with vbrackets of other heights and of being shifted upon the standard to adiust the alinement of the guides. Upon this racket and forming a part of the intermediate unit of the machine is a triple Slide-block guide, 7, 7, 7A. l l

The top of thestandard hasa horizontal limb 8, upon which the bracket 5 is planted in rearwardly projecting relation to the standard. At'the top of the bracket is av seat 9, to which the motor field-frame 1sv secured by screws/v9, and at thefront'is a face portion 10, set back from the front lines of the standard and extended upward above said seat. The base of the bracket is 'united toward'the rear with the limb 8 by a vertical screw 11, permitting a slight degree of swiveling of the bracket relatively to the standard under the control of a pair of horizontal set screws 12A, threaded through a bifurcated, rear lower portion of the bracket to bear upon o posite sides of a reduced extremity 13 of tlie'bracket. The face portion of the bracket is formed with lower and upper forward projections 14 and 15, (hs.

posed approximately over the transverse lines of the standard. The lower projection 14 is slotted or doubled, as shown in Figs. 9 and 11, and depressed below the base of the bracket so as to straddle the top of the standard, with room for a limited amount of lateral movement about the screw 11.

The guides 7 and 7A are mounted in the face portion of the bracket and in its upper and lower projections, the guides being three in number and disposed in the form of a' triangle, two in front and the other centrally in rear thereof. To accommodate the rear guide 7Av the face portion 10is constructed with alongitudinal recess or opening 16, see Fig. 9. This rod is received at its opposite ends in alined openings 1 7 and 18 in the top of the bracket portion 10 and in the forward portion 19 of its base, and is held against longitudinal displacement thereinby abutment against the top of the standard and against a plate 20 applied to the top of said face portion. The forward pair of rods7 are similarly held in openings 21 and 22 in the projections 14and 15, and are retained by the said plate 2O and by `bottom plates 23 secured to the under sides of the lower` projections.

The slide-block 24, shown in detail in Figs. 4 and 5,' is constructed with upper and llower pairs of lateral bearings 25, to emthe pitman 26 by which it is driven from the motor, ythe said means comprising a vertical lug 27 on the lower part of the slide-block, to which the upper end of the knife is d irectly secured by a bolt, and a wrist-pin 29 screwed into `the upperV portion of the slideblock and pivotally receiving thelower end of the pitman.

The motor 6 is of the construction disclosed in our copending' application tiled March 15, 1917, Serial No. 154,913, for rotary knife machine, to which reference may be had for a detailed description, and wherein claims generic to the two cases, based upon this feature, will be found. In the present instance the motor is Set horizon-- tally, instead of vertically, with its armature shaft 30 ranging fore and aft'. Upon the forward end of 'this shaft, outside the fieldframe, is a counterweighted eccentric disk 31, which is located above the slide-block and its guides. The upper end of the pitman 26 is mounted by means of a ball bearing 32 upon a crank pin 33 fixed in the crank, and extends downward in front of the crank and the slide-block toconnect with the wrist-pin 29 as described.

' Lubrication of the front bearing 61 of the `motor shaft and of the slide bearing of the slide-block' is advantageously effected through the provision of an oil duct 34, eX- tending downward from an oil cup 62 through the motor frame to the shaft and thence to a cupped opening 35 in the plate 20, by which the oil is admitted to the upper ends of longitudinal cavities 36 in the guide rods 7 and 7A. Openings 37, leading outward from these cavities through the walls of the tubes and communicating with exterior grooves 38, conduct the oil thus received to the outside of the guide lrods, where it is further distributed by the action of the slide-block as it moves up and down. Lubrication of theipitman bearing 32 is also effected from the same source by means com'- prising a stationary tube or short duct 63 inserted in the front of the motor frame in position vto`divert a portion of the oil flowing through the channel 34, an annular trough 64 in the rear face of the crank, into which this tube delivers, and a short radial channel 65 drilled in the crank and crank pin, to conduct the oil urged by centrifugal force from said trough to a longitudinal passage 66 in the interior of the pin, from which the oil reaches the bearing 32 through a lateral hole 67.

The rearwardly projecting handle 39, by which the machine is advanced in the direction of the cut, is screwed at 40 to the botat its top, the terminals of the said piece 42 being connected with the motor windings, as will be understood. It will thus be s een that the electrical parts of the machine are all embodied'in a unit by themselves, which may be removed and replaced substantially independently of the purely mechanical parts.`

The operating parts at the front of the machine are'inclosed and protected by a cover 43, comprising a substantially circular portion applied to the front boss 44 of the motor frame and inclosing thev crank and the upper part of the pitman, and a downward extension 45 inclosing the slide-block guides, the lower part of the pitxnan, and the upper portion of the knife. The reinainder of the knife is guarded by a vertical bar 46, which is slidablyand adjustably mounted upon the front of the cover 43, and the lower end of which carries a presser-foot 47. This bar passes through a guide box 48 upon said cover, to which it is normally connected by a pivoted catch 49 mounted in a block 50 on the bar, the top of the catch engaging beneath a lug 51 on the front or cover lsection 52 of the said guide box. The catch 49.. and lug 51 constitute a detachable coupling, which normally holds the presser-foot at the desired position, but permits the bar and presserfoot to be raised freely when desired. The

catch 49 holds the bar and presser-foot to the part 52 with respect to upward pressure upon the presser-foot; or upon releasing the catch the presser-foot and bar may be vlifted freely. The abutment of the block 50 against the top of the guide box 48 holds the parts against slipping downward. The position of the block lengthwise upon the bar 46 may be shifted by virtue of the provision of a clutch 53, thus adjusting the height at which the presser-foot is normally maintained. This clutch, the manner in which the block 50 cooperates with the bar and the guide box, and the catch 49 are all known features of construction which do not require more detailed illustration or explanation.

The improvement in this part of the machine consists, specifically speaking, in making the cover section 52 of the guide box vertically yieldable against the action of springs, so that the presser-foot may rise automatically under vexcessive pressure, as when riding over a high spot. In other words the relatively stationary part to which the bar and presser foot are normally coupled bycatch 49 and lug 51 is capable of limited self-restoring movement. The preferred construction is illustrated in Figs. 13 to 17, wherein it Will be seen that the body of the guide box has a central rectangular grooved way 54 for the bar 46 and vertically elongated side cavities 55 for the reception of helical compression springs 56.

The cover section 52, which carries the lug 51, has a longitudinal rib 57 upon its inner facey which is also guided in the groove 54, and a pair of inwardly projecting pins 58 which engage the-lower ends of the springs, which are thus compressed by upward movement of the said part and restore it to its lowermost position as soon as the external pressure is relieved. The cover section of the guide box is 'held in place by screws 59 passing loosely through vertical slots 60 in said section and screwed into the body.

What we claim as new is: l

1. In a reciprocating straight-knife vclothcutting machine, the combination of a base, a support rising therefrom, a knife operating in front of the su Jport, a motor mounted on the support, acran upon the forward end of the motor. shaft, a pitman extending downward from the crank, a triple guide below the crank and behind the pitman, and a slide-block connecting with the pitman and knife and having a triangle of bearings coperating with the triple guide.

2. In a reciprocating straight-knife clothcutting machine, the combination of a base, a support rising therefrom, a knife operating in front of the support, a motor mounted on the support, a crank upon the forward end of the motor shaft, a pitman extending downward from the crank, three vertical guide rods mounted below` the crank and behind the pitman, the same being disposed two in front and one centrally in rear, and a slide-block havin lateral -bearings slidably engaging the tfront pair of rods and rearwardly projectin bearings engaging the rear rod and orwardly projecting means for connection with the pitman and knife.

3. In a reciprocating straight-knife clothcutting machine, the combination of a base, a support rising therefrom, a knife operating infront of the support, a motor mounted on the support, a crank upon the forward end of the motor shaft, a pit-man extending downward from the crank, three vertical guide rods mounted below the crank and beind the pitman, the same being disposed two in front and one centrally in rear, a slide-block having lateral bearings slidably engaging the front pair of rods and rearwardly .projecting bearings engaging the rear rod, and a wrist-pin and a knife-lug projecting forward from the slide-block at different heights and constituting the connections respectively `for the pitman and knife.

4. Ina reciprocating straight-knife clothcuttin-g machine, the combination of a base, a support rising therefrom, the upper part of the support being set back and provided with a vertical recess in its face, a knife guided in the support below said part, a motor on top of the support, a crank on the forward end of the motor shaft, a pitman extending downward from the crank, three guide rods, one in said recess and the other two in front, and a slide-block having bearings coperating with the respective rods and connected with the pitman and knife.

5. In a reciprocating straight-knife clothcutting machine, a base, a standard, a knife guided in the standard, a rearwardly projecting motor bracket mounted on the standard, a motor planted on the motor bracket, a crankand a downwardly extending pitman on the forward end of the motor shaft, in combination with guides carried Wholly upon the front of said motor bracket, and a slide-block on said ides connecting with the pitman and kni 6. In a reciprocating straight-knife clothv carrying guides wholly thereon, a motor on the rearwardly projecting portion of the motor bracketl behind said vertically eX- tended face portion, a crank and a downwardly extending pitman on the forward end of the motor shaft, and a slide-block on said guides on the face portion of the motor bracket connecting with the pitman and knife.

7. In a reciprocating straight-knife clothcutting machine, the combination with a base, standard and knife, of a rearwardly projecting motor bracket mounted on the standard land having a vertically extended face portion set back from the front of the standard and provided with forward projections at top and bottom, guides extend-` ing between and carried wholly by said projections, a motor planted on the. motor bracket behind said vertically extended face portion, a crank and pitman on the forward end of the motor shaft, and a slideblock on the guides connecting with the pitman and knife.

8. In a reciprocating straight-knife clothcutting machine, the combination with a base, a support rising therefrom, a knife, a motor' on the support having a shaft and a forward shaft bearing, of means for supplying lubricant to said motor shaft bearing, a crankdisk on the forward end of the motor Shaft havin an annular trough in its rear face, a stationary tube connected with said lubricant supplying means and projecting into the bar wherein the bar is movable, one portion of `the guide being vertically yieldable and pressed downward by springs, and a detachable coupling between the bar and yieldable portion of the guide.

l0. In a reciprocating straight-knife clothcutting machine, the combination'4 of a presser-foot and vertical bar, a supporting member, a guide box thereon having a vertically yieldable cover and spring cavities containing springs normally holding the cover down, and a catch for connecting the bar and cover.

11. In a reciprocating straight-knife cloth-cutting machine, the combination with a base, uprising support, vertical knife, motor-driven means for operating the knife, and a front cover, of a presser-foot and vertical bar, means on the cover for guiding the bar, an adjustable block on the bar. a member spring-pressed downward, and means for catching the adjustable block to said member.

MARTIN ZAWISTOWSKI. NICOLAS KOMOW. 

